Just because a garden sprayer stops working doesn’t mean you should throw it out and get another one. The same thing is going to happen to the new one. These sprayers need maintenance. Once you understand the concept of how to fix these you’ll probably be picking these up on the side of the road when other people just threw them away. The amazon links for silicone grease or a new sprayer are below...

silicone grease: https://amzn.to/3vMyTgF
1gallon garden sprayer: https://amzn.to/397dyqD

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